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| 1 // Copyright (c) 2008, Google Inc. | |
| 2 // All rights reserved. | |
| 3 // | |
| 4 // Redistribution and use in source and binary forms, with or without | |
| 5 // modification, are permitted provided that the following conditions are | |
| 6 // met: | |
| 7 // | |
| 8 // * Redistributions of source code must retain the above copyright | |
| 9 // notice, this list of conditions and the following disclaimer. | |
| 10 // * Redistributions in binary form must reproduce the above | |
| 11 // copyright notice, this list of conditions and the following disclaimer | |
| 12 // in the documentation and/or other materials provided with the | |
| 13 // distribution. | |
| 14 // * Neither the name of Google Inc. nor the names of its | |
| 15 // contributors may be used to endorse or promote products derived from | |
| 16 // this software without specific prior written permission. | |
| 17 // | |
| 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | |
| 30 #include "config.h" | |
| 31 #include <algorithm> | |
| 32 #include <windows.h> | |
| 33 #include <vsstyle.h> | |
| 34 #include "FrameView.h" | |
| 35 #include "GraphicsContext.h" | |
| 36 #include "IntRect.h" | |
| 37 #include "NativeImageSkia.h" | |
| 38 #include "PlatformMouseEvent.h" | |
| 39 #include "PlatformScrollBar.h" | |
| 40 #include "Range.h" | |
| 41 #include "ScrollView.h" | |
| 42 #include "WidgetClientWin.h" | |
| 43 | |
| 44 #include "graphics/SkiaUtils.h" | |
| 45 | |
| 46 #undef LOG | |
| 47 #include "base/gfx/native_theme.h" | |
| 48 #include "base/gfx/platform_canvas_win.h" | |
| 49 #include "base/win_util.h" | |
| 50 #include "webkit/glue/webframe_impl.h" | |
| 51 #include "webkit/glue/webkit_glue.h" | |
| 52 | |
| 53 namespace WebCore { | |
| 54 | |
| 55 const int PlatformScrollbar::kOffSideMultiplier = 8; | |
| 56 const int PlatformScrollbar::kOffEndMultiplier = 3; | |
| 57 const double PlatformScrollbar::kAutorepeatInitialDelay = 0.4; | |
| 58 const double PlatformScrollbar::kAutorepeatRepeatInterval = 1. / 15.; | |
| 59 | |
| 60 // The scrollbar size in DumpRenderTree on the Mac - so we can match their | |
| 61 // layout results. Entries are for regular, small, and mini scrollbars. | |
| 62 // Metrics obtained using [NSScroller scrollerWidthForControlSize:] | |
| 63 static const int kMacScrollbarSize[3] = {15, 11, 15}; | |
| 64 | |
| 65 // Scrollbar button and thumb sizes, for consistent layout results. The Mac | |
| 66 // value is not readily available, but it's not really needed, since these | |
| 67 // metrics only affect drawing within the scrollbar itself. These are the | |
| 68 // standard Windows values without Large Fonts. | |
| 69 static const int kLayoutTestScrollbarButtonGirth = 17; | |
| 70 static const int kLayoutTestScrollbarThumbGirth = 17; | |
| 71 | |
| 72 | |
| 73 /*static*/ void PlatformScrollbar::themeChanged() | |
| 74 { | |
| 75 // TODO(darin): implement this | |
| 76 } | |
| 77 | |
| 78 /*static*/ int PlatformScrollbar::horizontalScrollbarHeight( | |
| 79 ScrollbarControlSize controlSize) | |
| 80 { | |
| 81 return webkit_glue::IsLayoutTestMode() ? kMacScrollbarSize[controlSize] : | |
| 82 GetSystemMetrics(SM_CYHSCROLL); | |
| 83 } | |
| 84 | |
| 85 /*static*/ int PlatformScrollbar::verticalScrollbarWidth( | |
| 86 ScrollbarControlSize controlSize) | |
| 87 { | |
| 88 return webkit_glue::IsLayoutTestMode() ? kMacScrollbarSize[controlSize] : | |
| 89 GetSystemMetrics(SM_CXVSCROLL); | |
| 90 } | |
| 91 | |
| 92 PlatformScrollbar::PlatformScrollbar(ScrollbarClient* client, | |
| 93 ScrollbarOrientation orientation, | |
| 94 ScrollbarControlSize controlSize) | |
| 95 : Scrollbar(client, orientation, controlSize) | |
| 96 , m_lastNativePos(-1, -1) // initialize to bogus values | |
| 97 , m_mouseOver(None) | |
| 98 , m_captureStart(None) | |
| 99 #pragma warning(suppress: 4355) // it's okay to pass |this| here! | |
| 100 , m_autorepeatTimer(this, &PlatformScrollbar::autoscrollTimerFired) | |
| 101 , m_enabled(true) | |
| 102 , m_needsLayout(true) | |
| 103 { | |
| 104 } | |
| 105 | |
| 106 PlatformScrollbar::~PlatformScrollbar() | |
| 107 { | |
| 108 } | |
| 109 | |
| 110 int PlatformScrollbar::width() const | |
| 111 { | |
| 112 return orientation() == VerticalScrollbar ? | |
| 113 verticalScrollbarWidth(controlSize()) : Widget::width(); | |
| 114 } | |
| 115 | |
| 116 int PlatformScrollbar::height() const | |
| 117 { | |
| 118 return orientation() == HorizontalScrollbar ? | |
| 119 horizontalScrollbarHeight(controlSize()) : Widget::height(); | |
| 120 } | |
| 121 | |
| 122 void PlatformScrollbar::setRect(const IntRect& rect) | |
| 123 { | |
| 124 setFrameGeometry(rect); | |
| 125 } | |
| 126 | |
| 127 void PlatformScrollbar::setEnabled(bool enabled) | |
| 128 { | |
| 129 if (m_enabled == enabled) | |
| 130 return; | |
| 131 | |
| 132 m_enabled = enabled; | |
| 133 invalidate(); | |
| 134 } | |
| 135 | |
| 136 void PlatformScrollbar::DrawTickmarks(GraphicsContext* context) const | |
| 137 { | |
| 138 // We don't draw on the horizontal scrollbar. It is too confusing | |
| 139 // to have the tickmarks appear on both scrollbars. | |
| 140 const bool horz = orientation() == HorizontalScrollbar; | |
| 141 if (horz) | |
| 142 return; | |
| 143 | |
| 144 // We need to as the WidgetClientWin for the bitmap to use to draw. | |
| 145 WidgetClientWin* widget_client = static_cast<WidgetClientWin*>( | |
| 146 WebCore::Widget::client()); | |
| 147 if (!widget_client) | |
| 148 return; // Cannot draw without access to the bitmap. | |
| 149 | |
| 150 // Get the frame view this scroll bar belongs to. | |
| 151 FrameView* view = reinterpret_cast<FrameView*>(parent()); | |
| 152 ASSERT(view); | |
| 153 | |
| 154 // A frame can be null if this function is called for the scroll views | |
| 155 // used when drawing drop-down boxes. We don't need to draw anything in | |
| 156 // such cases. | |
| 157 if (!view->frame()) | |
| 158 return; | |
| 159 | |
| 160 // Find out if the frame has any tickmarks. | |
| 161 const Vector<RefPtr<Range> >& tickmarks = | |
| 162 WebFrameImpl::FromFrame(view->frame())->tickmarks(); | |
| 163 if (tickmarks.isEmpty()) | |
| 164 return; | |
| 165 | |
| 166 RECT track_area; | |
| 167 if (m_segmentRects[Track].left != -1) { | |
| 168 // Scroll bar is too small to draw a thumb. | |
| 169 track_area.left = m_segmentRects[Track].left; | |
| 170 track_area.top = m_segmentRects[Track].top; | |
| 171 track_area.right = m_segmentRects[Track].right - 1; | |
| 172 track_area.bottom = m_segmentRects[Track].bottom - 1; | |
| 173 } else { | |
| 174 // Find the area between the arrows of the scroll bar. | |
| 175 track_area.left = m_segmentRects[BeforeThumb].left; | |
| 176 track_area.top = m_segmentRects[BeforeThumb].top; | |
| 177 track_area.right = m_segmentRects[AfterThumb].right - 1; | |
| 178 track_area.bottom = m_segmentRects[AfterThumb].bottom - 1; | |
| 179 } | |
| 180 | |
| 181 // We now can figure out the actual height and width of the track. | |
| 182 const int track_height = track_area.bottom - track_area.top; | |
| 183 const int track_width = track_area.right - track_area.left; | |
| 184 | |
| 185 if (track_height <= 0 || track_width <= 0) | |
| 186 return; // nothing to draw on. | |
| 187 | |
| 188 // NOTE: We tolerate the platformContext() call here because the scrollbars | |
| 189 // will not be serialized, i.e. composition is done in the renderer and | |
| 190 // never in the browser. | |
| 191 // Prepare the bitmap for drawing the tickmarks on the scroll bar. | |
| 192 gfx::PlatformCanvas* canvas = context->platformContext()->canvas(); | |
| 193 | |
| 194 // Load the image for the tickmark. | |
| 195 static RefPtr<Image> dashImg = Image::loadPlatformResource("tickmarkDash"); | |
| 196 DCHECK(dashImg); | |
| 197 if (dashImg->isNull()) { | |
| 198 ASSERT_NOT_REACHED(); | |
| 199 return; | |
| 200 } | |
| 201 const NativeImageSkia* dash = dashImg->nativeImageForCurrentFrame(); | |
| 202 | |
| 203 for (Vector<RefPtr<Range> >::const_iterator i = | |
| 204 tickmarks.begin(); | |
| 205 i != tickmarks.end(); ++i) { | |
| 206 const RefPtr<Range> range = (*i); | |
| 207 | |
| 208 if (!WebFrameImpl::RangeShouldBeHighlighted(range.get())) | |
| 209 continue; | |
| 210 | |
| 211 const IntRect& bounds = range->boundingBox(); | |
| 212 | |
| 213 // Calculate how far down (in %) the tick-mark should appear. | |
| 214 const float percent = static_cast<float>(bounds.y()) / m_totalSize; | |
| 215 | |
| 216 // Calculate how far down (in pixels) the tick-mark should appear. | |
| 217 const int y_pos = track_area.top + (track_height * percent); | |
| 218 | |
| 219 // Draw the tick-mark as a rounded rect with a slightly curved edge. | |
| 220 canvas->drawBitmap(*dash, track_area.left, y_pos); | |
| 221 } | |
| 222 } | |
| 223 | |
| 224 // paint in the coordinate space of our parent's content area | |
| 225 void PlatformScrollbar::paint(GraphicsContext* gc, const IntRect& damageRect) | |
| 226 { | |
| 227 if (gc->paintingDisabled()) | |
| 228 return; | |
| 229 | |
| 230 // Don't paint anything if the scrollbar doesn't intersect the damage rect. | |
| 231 if (!frameGeometry().intersects(damageRect)) | |
| 232 return; | |
| 233 | |
| 234 gc->save(); | |
| 235 gc->translate(x(), y()); | |
| 236 | |
| 237 layout(); | |
| 238 | |
| 239 HDC hdc = gc->getWindowsContext(damageRect); | |
| 240 const bool horz = orientation() == HorizontalScrollbar; | |
| 241 const PlatformContextSkia* const skia = gc->platformContext(); | |
| 242 const gfx::NativeTheme* const nativeTheme = skia->nativeTheme(); | |
| 243 gfx::PlatformCanvasWin* const canvas = skia->canvas(); | |
| 244 | |
| 245 // Draw the up/left arrow of the scroll bar. | |
| 246 nativeTheme->PaintScrollbarArrow(hdc, getThemeArrowState(Arrow1), | |
| 247 (horz ? DFCS_SCROLLLEFT : DFCS_SCROLLUP) | | |
| 248 getClassicThemeState(Arrow1), | |
| 249 &m_segmentRects[Arrow1]); | |
| 250 | |
| 251 if (m_segmentRects[Track].left != -1) { | |
| 252 // The scroll bar is too small to draw the thumb. Just draw a | |
| 253 // single track between the arrows. | |
| 254 nativeTheme->PaintScrollbarTrack(hdc, | |
| 255 horz ? SBP_UPPERTRACKHORZ : | |
| 256 SBP_UPPERTRACKVERT, | |
| 257 getThemeState(Track), | |
| 258 getClassicThemeState(Track), | |
| 259 &m_segmentRects[Track], | |
| 260 &m_segmentRects[Track], canvas); | |
| 261 DrawTickmarks(gc); | |
| 262 } else { | |
| 263 // Draw the track area before the thumb on the scroll bar. | |
| 264 nativeTheme->PaintScrollbarTrack(hdc, | |
| 265 horz ? SBP_UPPERTRACKHORZ : | |
| 266 SBP_UPPERTRACKVERT, | |
| 267 getThemeState(BeforeThumb), | |
| 268 getClassicThemeState(BeforeThumb), | |
| 269 &m_segmentRects[BeforeThumb], | |
| 270 &m_segmentRects[BeforeThumb], canvas); | |
| 271 | |
| 272 // Draw the track area after the thumb on the scroll bar. | |
| 273 nativeTheme->PaintScrollbarTrack(hdc, | |
| 274 horz ? SBP_LOWERTRACKHORZ : | |
| 275 SBP_LOWERTRACKVERT, | |
| 276 getThemeState(AfterThumb), | |
| 277 getClassicThemeState(AfterThumb), | |
| 278 &m_segmentRects[AfterThumb], | |
| 279 &m_segmentRects[BeforeThumb], canvas); | |
| 280 | |
| 281 // Draw the tick-marks on the scroll bar, if any tick-marks | |
| 282 // exist. Note: The thumb will be drawn on top of the tick-marks, | |
| 283 // which is desired. | |
| 284 DrawTickmarks(gc); | |
| 285 | |
| 286 // Draw the thumb (the box you drag in the scroll bar to scroll). | |
| 287 nativeTheme->PaintScrollbarThumb(hdc, | |
| 288 horz ? SBP_THUMBBTNHORZ : | |
| 289 SBP_THUMBBTNVERT, | |
| 290 getThemeState(Thumb), | |
| 291 getClassicThemeState(Thumb), | |
| 292 &m_segmentRects[Thumb]); | |
| 293 | |
| 294 // Draw the gripper (the three little lines on the thumb). | |
| 295 nativeTheme->PaintScrollbarThumb(hdc, | |
| 296 horz ? SBP_GRIPPERHORZ : | |
| 297 SBP_GRIPPERVERT, | |
| 298 getThemeState(Thumb), | |
| 299 getClassicThemeState(Thumb), | |
| 300 &m_segmentRects[Thumb]); | |
| 301 } | |
| 302 | |
| 303 // Draw the down/right arrow of the scroll bar. | |
| 304 nativeTheme->PaintScrollbarArrow(hdc, getThemeArrowState(Arrow2), | |
| 305 (horz ? | |
| 306 DFCS_SCROLLRIGHT : DFCS_SCROLLDOWN) | | |
| 307 getClassicThemeState(Arrow2), | |
| 308 &m_segmentRects[Arrow2]); | |
| 309 gc->releaseWindowsContext(hdc, damageRect); | |
| 310 | |
| 311 gc->restore(); | |
| 312 } | |
| 313 | |
| 314 void PlatformScrollbar::setFrameGeometry(const IntRect& rect) | |
| 315 { | |
| 316 if (rect == frameGeometry()) | |
| 317 return; | |
| 318 | |
| 319 Widget::setFrameGeometry(rect); | |
| 320 m_needsLayout = true; | |
| 321 // NOTE: we assume that our caller will invalidate us | |
| 322 } | |
| 323 | |
| 324 bool PlatformScrollbar::handleMouseMoveEvent(const PlatformMouseEvent& e) | |
| 325 { | |
| 326 if (!parent()) | |
| 327 return true; | |
| 328 | |
| 329 if (m_captureStart != None) { | |
| 330 handleMouseMoveEventWhenCapturing(e); | |
| 331 return true; | |
| 332 } | |
| 333 | |
| 334 IntPoint pos = convertFromContainingWindow(e.pos()); | |
| 335 updateMousePosition(pos.x(), pos.y()); | |
| 336 | |
| 337 // FIXME: Invalidate only the portions that actually changed | |
| 338 invalidate(); | |
| 339 return true; | |
| 340 } | |
| 341 | |
| 342 bool PlatformScrollbar::handleMouseOutEvent(const PlatformMouseEvent& e) | |
| 343 { | |
| 344 if (!parent()) | |
| 345 return true; | |
| 346 | |
| 347 ASSERT(m_captureStart == None); | |
| 348 | |
| 349 // Pass bogus values that will never match real mouse coords. | |
| 350 updateMousePosition(-1, -1); | |
| 351 | |
| 352 // FIXME: Invalidate only the portions that actually changed | |
| 353 invalidate(); | |
| 354 return true; | |
| 355 } | |
| 356 | |
| 357 bool PlatformScrollbar::handleMouseReleaseEvent(const PlatformMouseEvent& e) | |
| 358 { | |
| 359 ScrollView* parentView = parent(); | |
| 360 if (!parentView) | |
| 361 return true; | |
| 362 | |
| 363 IntPoint pos = convertFromContainingWindow(e.pos()); | |
| 364 updateMousePosition(pos.x(), pos.y()); | |
| 365 | |
| 366 setCapturingMouse(false); | |
| 367 | |
| 368 // FIXME: Invalidate only the portions that actually changed | |
| 369 invalidate(); | |
| 370 return true; | |
| 371 } | |
| 372 | |
| 373 bool PlatformScrollbar::handleMousePressEvent(const PlatformMouseEvent& e) | |
| 374 { | |
| 375 if (!parent()) | |
| 376 return true; | |
| 377 | |
| 378 // TODO(pkasting): http://b/583875 Right-click should invoke a context menu | |
| 379 // (maybe this would be better handled elsewhere?) | |
| 380 if (!m_enabled || (e.button() != LeftButton)) { | |
| 381 return true; | |
| 382 } | |
| 383 | |
| 384 ASSERT(m_captureStart == None); | |
| 385 | |
| 386 IntPoint pos = convertFromContainingWindow(e.pos()); | |
| 387 | |
| 388 const bool horz = (orientation() == HorizontalScrollbar); | |
| 389 updateMousePosition(pos.x(), pos.y()); | |
| 390 switch (m_mouseOver) { | |
| 391 case Arrow1: | |
| 392 scroll(horz ? ScrollLeft : ScrollUp, ScrollByLine); | |
| 393 break; | |
| 394 case Track: | |
| 395 return true; | |
| 396 case BeforeThumb: | |
| 397 scroll(horz ? ScrollLeft : ScrollUp, ScrollByPage); | |
| 398 break; | |
| 399 case Thumb: | |
| 400 m_dragOrigin.thumbPos = horz ? pos.x() : pos.y(); | |
| 401 m_dragOrigin.scrollVal = value(); | |
| 402 break; | |
| 403 case AfterThumb: | |
| 404 scroll(horz ? ScrollRight : ScrollDown, ScrollByPage); | |
| 405 break; | |
| 406 case Arrow2: | |
| 407 scroll(horz ? ScrollRight : ScrollDown, ScrollByLine); | |
| 408 break; | |
| 409 default: | |
| 410 ASSERT_NOT_REACHED(); | |
| 411 } | |
| 412 | |
| 413 setCapturingMouse(true); | |
| 414 | |
| 415 // Kick off auto-repeat timer | |
| 416 if (m_mouseOver != Thumb) | |
| 417 m_autorepeatTimer.start(kAutorepeatInitialDelay, | |
| 418 kAutorepeatRepeatInterval); | |
| 419 | |
| 420 m_needsLayout = true; | |
| 421 // FIXME: Invalidate only the portions that actually changed | |
| 422 invalidate(); | |
| 423 | |
| 424 return true; | |
| 425 } | |
| 426 | |
| 427 void PlatformScrollbar::handleMouseMoveEventWhenCapturing(const PlatformMouseEve
nt& e) | |
| 428 { | |
| 429 IntPoint pos = convertFromContainingWindow(e.pos()); | |
| 430 updateMousePosition(pos.x(), pos.y()); | |
| 431 | |
| 432 if (m_captureStart != Thumb) { | |
| 433 // FIXME: Invalidate only the portions that actually changed | |
| 434 invalidate(); | |
| 435 return; | |
| 436 } | |
| 437 | |
| 438 int xCancelDistance, yCancelDistance, backgroundSpan, thumbGirth, delta; | |
| 439 // NOTE: The cancel distance calculations are based on the behavior of the | |
| 440 // MSVC8 main window scrollbar + some guessing/extrapolation | |
| 441 if (orientation() == HorizontalScrollbar) { | |
| 442 xCancelDistance = kOffEndMultiplier * horizontalScrollbarHeight(); | |
| 443 yCancelDistance = kOffSideMultiplier * horizontalScrollbarHeight(); | |
| 444 backgroundSpan = m_segmentRects[AfterThumb].right - | |
| 445 m_segmentRects[BeforeThumb].left; | |
| 446 thumbGirth = m_segmentRects[Thumb].right - m_segmentRects[Thumb].left; | |
| 447 delta = pos.x() - m_dragOrigin.thumbPos; | |
| 448 } else { | |
| 449 xCancelDistance = kOffSideMultiplier * verticalScrollbarWidth(); | |
| 450 yCancelDistance = kOffEndMultiplier * verticalScrollbarWidth(); | |
| 451 backgroundSpan = m_segmentRects[AfterThumb].bottom - | |
| 452 m_segmentRects[BeforeThumb].top; | |
| 453 thumbGirth = m_segmentRects[Thumb].bottom - m_segmentRects[Thumb].top; | |
| 454 delta = pos.y() - m_dragOrigin.thumbPos; | |
| 455 } | |
| 456 | |
| 457 // Snap scrollbar back to drag origin if mouse gets too far away | |
| 458 if ((m_lastNativePos.x() < | |
| 459 (m_segmentRects[BeforeThumb].left - xCancelDistance)) || | |
| 460 (m_lastNativePos.x() > | |
| 461 (m_segmentRects[AfterThumb].right + xCancelDistance)) || | |
| 462 (m_lastNativePos.y() < | |
| 463 (m_segmentRects[BeforeThumb].top - yCancelDistance)) || | |
| 464 (m_lastNativePos.y() > | |
| 465 (m_segmentRects[AfterThumb].bottom + yCancelDistance))) | |
| 466 delta = 0; | |
| 467 | |
| 468 // Convert delta from pixel coords to scrollbar logical coords | |
| 469 if (backgroundSpan > thumbGirth) { | |
| 470 if (setValue(m_dragOrigin.scrollVal + (delta * | |
| 471 (m_totalSize - m_visibleSize) / (backgroundSpan - thumbGirth)))) { | |
| 472 m_needsLayout = true; | |
| 473 // FIXME: Invalidate only the portions that actually changed | |
| 474 invalidate(); | |
| 475 } | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 IntRect PlatformScrollbar::windowClipRect() const | |
| 480 { | |
| 481 if (m_client) | |
| 482 return m_client->windowClipRect(); | |
| 483 | |
| 484 return convertToContainingWindow(IntRect(0, 0, width(), height())); | |
| 485 } | |
| 486 | |
| 487 void PlatformScrollbar::updateThumbPosition() | |
| 488 { | |
| 489 m_needsLayout = true; | |
| 490 // FIXME: Invalidate only the portions that actually changed | |
| 491 invalidate(); | |
| 492 } | |
| 493 | |
| 494 void PlatformScrollbar::updateThumbProportion() | |
| 495 { | |
| 496 // RenderLayer::updateScrollInfoAfterLayout changes the enabled state when | |
| 497 // the style is OSCROLL, however it doesn't change it when the style is OAUT
O. | |
| 498 // As a workaround we enable the scrollbar if the visible size is less than | |
| 499 // the total size | |
| 500 if (!m_enabled && m_visibleSize < m_totalSize) { | |
| 501 setEnabled(true); | |
| 502 } | |
| 503 | |
| 504 // If the thumb was at the end of the track and the scrollbar was resized | |
| 505 // smaller, we need to cap the value to the new maximum. | |
| 506 if (setValue(value())) | |
| 507 return; // updateThumbPosition() already invalidated as needed | |
| 508 | |
| 509 m_needsLayout = true; | |
| 510 // FIXME: Invalidate only the portions that actually changed | |
| 511 invalidate(); | |
| 512 } | |
| 513 | |
| 514 void PlatformScrollbar::autoscrollTimerFired(Timer<PlatformScrollbar>*) | |
| 515 { | |
| 516 ASSERT((m_captureStart != None) && (m_mouseOver == m_captureStart)); | |
| 517 | |
| 518 const bool horz = (orientation() == HorizontalScrollbar); | |
| 519 switch (m_captureStart) { | |
| 520 case Arrow1: | |
| 521 scroll(horz ? ScrollLeft : ScrollUp, ScrollByLine); | |
| 522 break; | |
| 523 case BeforeThumb: | |
| 524 scroll(horz ? ScrollLeft : ScrollUp, ScrollByPage); | |
| 525 break; | |
| 526 case AfterThumb: | |
| 527 scroll(horz ? ScrollRight : ScrollDown, ScrollByPage); | |
| 528 break; | |
| 529 case Arrow2: | |
| 530 scroll(horz ? ScrollRight : ScrollDown, ScrollByLine); | |
| 531 break; | |
| 532 default: | |
| 533 ASSERT_NOT_REACHED(); | |
| 534 } | |
| 535 } | |
| 536 | |
| 537 void PlatformScrollbar::setCapturingMouse(bool capturing) | |
| 538 { | |
| 539 if (capturing) { | |
| 540 m_captureStart = m_mouseOver; | |
| 541 } else { | |
| 542 m_captureStart = None; | |
| 543 m_autorepeatTimer.stop(); | |
| 544 } | |
| 545 } | |
| 546 | |
| 547 int PlatformScrollbar::scrollButtonGirth(int systemMetricsCode, int limit, | |
| 548 int* backgroundSpan) | |
| 549 { | |
| 550 const int girth = webkit_glue::IsLayoutTestMode() ? | |
| 551 kLayoutTestScrollbarButtonGirth : GetSystemMetrics(systemMetricsCode); | |
| 552 *backgroundSpan = limit - 2 * girth; | |
| 553 if (*backgroundSpan < 0) { | |
| 554 *backgroundSpan = 0; | |
| 555 return limit / 2; | |
| 556 } | |
| 557 return girth; | |
| 558 } | |
| 559 | |
| 560 int PlatformScrollbar::scrollThumbGirth(int systemMetricsCode, | |
| 561 int backgroundSpan) | |
| 562 { | |
| 563 const int minimumGirth = webkit_glue::IsLayoutTestMode() ? | |
| 564 kLayoutTestScrollbarThumbGirth : GetSystemMetrics(systemMetricsCode); | |
| 565 return std::max<int>(m_visibleSize * backgroundSpan / m_totalSize, | |
| 566 minimumGirth); | |
| 567 } | |
| 568 | |
| 569 void PlatformScrollbar::layout() | |
| 570 { | |
| 571 if (!m_needsLayout) | |
| 572 return; | |
| 573 m_needsLayout = false; | |
| 574 | |
| 575 const RECT invalid = {-1, -1, -1, -1}; | |
| 576 if (m_totalSize <= 0) { | |
| 577 for (int i = 0; i < NumSegments; ++i) | |
| 578 m_segmentRects[i] = invalid; | |
| 579 return; | |
| 580 } | |
| 581 | |
| 582 int buttonGirth, backgroundSpan, thumbGirth; | |
| 583 RECT box = {0}; | |
| 584 LONG* changingCoord1, * changingCoord2; | |
| 585 // For both orientations, we allow the buttonGirth to determine the | |
| 586 // backgroundSpan directly, to avoid rounding errors. | |
| 587 if (orientation() == HorizontalScrollbar) { | |
| 588 buttonGirth = scrollButtonGirth(SM_CXHSCROLL, width(), &backgroundSpan); | |
| 589 thumbGirth = scrollThumbGirth(SM_CXHTHUMB, backgroundSpan); | |
| 590 box.bottom += horizontalScrollbarHeight(); | |
| 591 changingCoord1 = &box.left; | |
| 592 changingCoord2 = &box.right; | |
| 593 } else { | |
| 594 buttonGirth = scrollButtonGirth(SM_CYVSCROLL, height(), | |
| 595 &backgroundSpan); | |
| 596 thumbGirth = scrollThumbGirth(SM_CYVTHUMB, backgroundSpan); | |
| 597 box.right += verticalScrollbarWidth(); | |
| 598 changingCoord1 = &box.top; | |
| 599 changingCoord2 = &box.bottom; | |
| 600 } | |
| 601 | |
| 602 // Scrollbar: |<|--------|XXX|------|>| | |
| 603 // Start arrow: |<| | |
| 604 *changingCoord2 += buttonGirth; | |
| 605 m_segmentRects[Arrow1] = box; | |
| 606 | |
| 607 if (thumbGirth >= backgroundSpan) { | |
| 608 if (backgroundSpan == 0) { | |
| 609 m_segmentRects[Track] = invalid; | |
| 610 } else { | |
| 611 // Track: |-------------------| | |
| 612 *changingCoord1 = *changingCoord2; | |
| 613 *changingCoord2 += backgroundSpan; | |
| 614 m_segmentRects[Track] = box; | |
| 615 } | |
| 616 | |
| 617 m_segmentRects[BeforeThumb] = invalid; | |
| 618 m_segmentRects[Thumb] = invalid; | |
| 619 m_segmentRects[AfterThumb] = invalid; | |
| 620 } else { | |
| 621 m_segmentRects[Track] = invalid; | |
| 622 | |
| 623 const int thumbOffset = (m_totalSize <= m_visibleSize) ? 0 : (value() * | |
| 624 (backgroundSpan - thumbGirth) / (m_totalSize - m_visibleSize)); | |
| 625 // Before thumb: |--------| | |
| 626 *changingCoord1 = *changingCoord2; | |
| 627 *changingCoord2 += thumbOffset; | |
| 628 m_segmentRects[BeforeThumb] = box; | |
| 629 | |
| 630 // Thumb: |XXX| | |
| 631 *changingCoord1 = *changingCoord2; | |
| 632 *changingCoord2 += thumbGirth; | |
| 633 m_segmentRects[Thumb] = box; | |
| 634 | |
| 635 // After thumb: |------| | |
| 636 *changingCoord1 = *changingCoord2; | |
| 637 *changingCoord2 += backgroundSpan - (thumbOffset + thumbGirth); | |
| 638 m_segmentRects[AfterThumb] = box; | |
| 639 } | |
| 640 | |
| 641 // End arrow: |>| | |
| 642 *changingCoord1 = *changingCoord2; | |
| 643 *changingCoord2 += buttonGirth; | |
| 644 m_segmentRects[Arrow2] = box; | |
| 645 | |
| 646 // Changed layout, so need to update m_mouseOver and m_autorepeatTimer | |
| 647 updateMousePositionInternal(); | |
| 648 | |
| 649 // DO NOT invalidate() here. We already invalidate()d for this layout when | |
| 650 // setting m_needsLayout = true; by the time we reach this point, we're | |
| 651 // called by paint(), so invalidate() is not only unnecessary but will | |
| 652 // waste effort. | |
| 653 } | |
| 654 | |
| 655 void PlatformScrollbar::updateMousePosition(int x, int y) | |
| 656 { | |
| 657 m_lastNativePos.setX(x); | |
| 658 m_lastNativePos.setY(y); | |
| 659 | |
| 660 if (m_needsLayout) | |
| 661 layout(); // Calls updateMousePositionInternal() | |
| 662 else | |
| 663 updateMousePositionInternal(); | |
| 664 } | |
| 665 | |
| 666 void PlatformScrollbar::updateMousePositionInternal() | |
| 667 { | |
| 668 m_mouseOver = None; | |
| 669 for (int i = 0; i < NumSegments; ++i) { | |
| 670 if ((m_lastNativePos.x() >= m_segmentRects[i].left) && | |
| 671 (m_lastNativePos.x() < m_segmentRects[i].right) && | |
| 672 (m_lastNativePos.y() >= m_segmentRects[i].top) && | |
| 673 (m_lastNativePos.y() < m_segmentRects[i].bottom)) { | |
| 674 m_mouseOver = static_cast<Segment>(i); | |
| 675 break; | |
| 676 } | |
| 677 } | |
| 678 | |
| 679 // Start/stop autorepeat timer if capturing something other than the thumb. | |
| 680 if ((m_captureStart != None) && (m_captureStart != Thumb)) { | |
| 681 if (m_mouseOver != m_captureStart) | |
| 682 m_autorepeatTimer.stop(); // Safe to call when already stopped | |
| 683 else if (!m_autorepeatTimer.isActive()) | |
| 684 m_autorepeatTimer.startRepeating(kAutorepeatRepeatInterval); | |
| 685 } | |
| 686 } | |
| 687 | |
| 688 int PlatformScrollbar::getThemeState(Segment target) const | |
| 689 { | |
| 690 // When dragging the thumb, draw thumb pressed and other segments normal | |
| 691 // regardless of where the cursor actually is. See also four places in | |
| 692 // getThemeArrowState(). | |
| 693 if (m_captureStart == Thumb) { | |
| 694 if (target == Thumb) | |
| 695 return SCRBS_PRESSED; | |
| 696 return (win_util::GetWinVersion() < win_util::WINVERSION_VISTA) ? | |
| 697 SCRBS_NORMAL : SCRBS_HOVER; | |
| 698 } | |
| 699 if (!m_enabled) | |
| 700 return SCRBS_DISABLED; | |
| 701 if ((m_mouseOver != target) || (target == Track)) { | |
| 702 return ((m_mouseOver == None) || | |
| 703 (win_util::GetWinVersion() < win_util::WINVERSION_VISTA)) ? | |
| 704 SCRBS_NORMAL : SCRBS_HOVER; | |
| 705 } | |
| 706 if (m_captureStart == None) | |
| 707 return SCRBS_HOT; | |
| 708 return (m_captureStart == target) ? SCRBS_PRESSED : SCRBS_NORMAL; | |
| 709 } | |
| 710 | |
| 711 int PlatformScrollbar::getThemeArrowState(Segment target) const | |
| 712 { | |
| 713 // We could take advantage of knowing the values in the state enum to write | |
| 714 // some simpler code, but treating the state enum as a black box seems | |
| 715 // clearer and more future-proof. | |
| 716 if (target == Arrow1) { | |
| 717 if (orientation() == HorizontalScrollbar) { | |
| 718 if (m_captureStart == Thumb) { | |
| 719 return | |
| 720 (win_util::GetWinVersion() < win_util::WINVERSION_VISTA) ? | |
| 721 ABS_LEFTNORMAL : ABS_LEFTHOVER; | |
| 722 } | |
| 723 if (!m_enabled) | |
| 724 return ABS_LEFTDISABLED; | |
| 725 if (m_mouseOver != target) { | |
| 726 return ((m_mouseOver == None) || | |
| 727 (win_util::GetWinVersion() < win_util::WINVERSION_VISTA)) ? | |
| 728 ABS_LEFTNORMAL : ABS_LEFTHOVER; | |
| 729 } | |
| 730 if (m_captureStart == None) | |
| 731 return ABS_LEFTHOT; | |
| 732 return (m_captureStart == target) ? | |
| 733 ABS_LEFTPRESSED : ABS_LEFTNORMAL; | |
| 734 } | |
| 735 if (m_captureStart == Thumb) { | |
| 736 return (win_util::GetWinVersion() < win_util::WINVERSION_VISTA) ? | |
| 737 ABS_UPNORMAL : ABS_UPHOVER; | |
| 738 } | |
| 739 if (!m_enabled) | |
| 740 return ABS_UPDISABLED; | |
| 741 if (m_mouseOver != target) { | |
| 742 return ((m_mouseOver == None) || | |
| 743 (win_util::GetWinVersion() < win_util::WINVERSION_VISTA)) ? | |
| 744 ABS_UPNORMAL : ABS_UPHOVER; | |
| 745 } | |
| 746 if (m_captureStart == None) | |
| 747 return ABS_UPHOT; | |
| 748 return (m_captureStart == target) ? ABS_UPPRESSED : ABS_UPNORMAL; | |
| 749 } | |
| 750 if (orientation() == HorizontalScrollbar) { | |
| 751 if (m_captureStart == Thumb) { | |
| 752 return (win_util::GetWinVersion() < win_util::WINVERSION_VISTA) ? | |
| 753 ABS_RIGHTNORMAL : ABS_RIGHTHOVER; | |
| 754 } | |
| 755 if (!m_enabled) | |
| 756 return ABS_RIGHTDISABLED; | |
| 757 if (m_mouseOver != target) { | |
| 758 return ((m_mouseOver == None) || | |
| 759 (win_util::GetWinVersion() < win_util::WINVERSION_VISTA)) ? | |
| 760 ABS_RIGHTNORMAL : ABS_RIGHTHOVER; | |
| 761 } | |
| 762 if (m_captureStart == None) | |
| 763 return ABS_RIGHTHOT; | |
| 764 return (m_captureStart == target) ? ABS_RIGHTPRESSED : ABS_RIGHTNORMAL; | |
| 765 } | |
| 766 if (m_captureStart == Thumb) { | |
| 767 return (win_util::GetWinVersion() < win_util::WINVERSION_VISTA) ? | |
| 768 ABS_DOWNNORMAL : ABS_DOWNHOVER; | |
| 769 } | |
| 770 if (!m_enabled) | |
| 771 return ABS_DOWNDISABLED; | |
| 772 if (m_mouseOver != target) { | |
| 773 return ((m_mouseOver == None) || | |
| 774 (win_util::GetWinVersion() < win_util::WINVERSION_VISTA)) ? | |
| 775 ABS_DOWNNORMAL : ABS_DOWNHOVER; | |
| 776 } | |
| 777 if (m_captureStart == None) | |
| 778 return ABS_DOWNHOT; | |
| 779 return (m_captureStart == target) ? ABS_DOWNPRESSED : ABS_DOWNNORMAL; | |
| 780 } | |
| 781 | |
| 782 int PlatformScrollbar::getClassicThemeState(Segment target) const | |
| 783 { | |
| 784 // When dragging the thumb, draw the buttons normal even when hovered. | |
| 785 if (m_captureStart == Thumb) | |
| 786 return 0; | |
| 787 if (!m_enabled) | |
| 788 return DFCS_INACTIVE; | |
| 789 if ((m_mouseOver != target) || (target == Track)) | |
| 790 return 0; | |
| 791 if (m_captureStart == None) | |
| 792 return DFCS_HOT; | |
| 793 return (m_captureStart == target) ? (DFCS_PUSHED | DFCS_FLAT) : 0; | |
| 794 } | |
| 795 | |
| 796 } // namespace WebCore | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 7419:
Move many files that were suffixed Win.cpp to Chromium.cpp, and place them in... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/